Thanks Ranjib! I had this all in place due to following the original guides. They are still pretty relevant despite some UI changes.Among Dose 1a and 1b , one of them has to be on, other off, then only doser will run, if both outlets are on or off at the same time , then doser won’t run.
My issue was with the driver itself. The instructions said to feed it a 5V power signal to the board. However, when the board is powered with 5v it expects a 5v control signals.
When I powered the board with 3v the motor worked entirely as expected!
I'm going to be purchasing a second pump to hook up now!